<div class="navbar navbar-top">
  <div class="navbar-inner">
    <div class="navbar-decor"></div>
    <div class="nav-collapse collapse">
      <div class="nav">
        <ul>
          <li ui-sref="/">首页</li>
          <li ui-sref="/practice1">练习1</li>
          <li ui-sref="/practice2">练习2</li>
          <li ui-sref="/practice3">练习3</li>
          <li ui-sref="/practice4">练习4</li>
        </ul>
      </div>
    </div>
  </div>
</div>